GEN6_BSD_RING_BASE
#define GEN6_VBSYNC (RING_SYNC_0(GEN6_BSD_RING_BASE))
#define GEN6_VRSYNC (RING_SYNC_1(GEN6_BSD_RING_BASE))
#define GEN6_VVESYNC (RING_SYNC_2(GEN6_BSD_RING_BASE))
{ .gen = 6, .base = GEN6_BSD_RING_BASE },
RING_TAIL(GEN6_BSD_RING_BASE), /* 0x12000 (base) */